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Method for extracting curcumin from ginger

A curcumin extraction technology, applied in chemical instruments and methods, azo dyes, organic dyes, etc., can solve the problems of low product extraction rate, high production cost, environmental pollution, etc., and achieve high purity and improved pigment extraction rate , The effect of simple process

Inactive Publication Date: 2015-06-17
QINGDAO PENGYUAN KANGHUA NATURAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to solve the technical problems of low product extraction rate, poor quality, high production cost and environmental pollution in the existing technology, and provides a method for extracting curcumin from ginger, which is characterized in that the Said method comprises the following steps:

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Acceptance of raw materials: select 20 kg of ginger with dark color, no frostbite, no rot, no pests and diseases, and wash to remove impurities such as sediment;

[0020] (2) Drying and crushing: Put it in an oven to control the temperature at 80°C, bake for 8 minutes, put the baked ginger in a grinder and grind it until the particle size is 105 mesh sieve;

[0021] (3) Alkaline water extraction: Put the crushed ginger into the aqueous solution of caustic soda, adjust the pH=8.0, and extract at 55-60°C for 3 hours;

[0022] (4) Filtration and adsorption: Filter the extract under reduced pressure, put the filtrate on the AB-8 macroporous resin adsorption column with a column height of 3m, a diameter of 0.8m, and 300kg of resin, and adsorb at a flow rate of 20M3 / h;

[0023] (5) Washing and desorption: add glacial acetic acid with 1% concentration and 98% glacial acetic acid to boil for 8 minutes, and elute with 80% alcohol until the turbidity of the washing liquid is ...

Embodiment 2

[0027] (1) Acceptance of raw materials: select 20 kg of ginger with dark color, no frostbite, no rot, no pests and diseases, and wash to remove impurities such as sediment;

[0028] (2) Drying and crushing: Put it in an oven to control the temperature at 100 ℃, bake for 10 minutes, put the baked ginger in a grinder and grind it until the particle size is 110 mesh sieve;

[0029] (3) Alkaline water extraction: Put the crushed ginger into the aqueous solution of caustic soda, adjust the pH=8.5, and extract at 60°C for 4 hours;

[0030] (4) Filtration and adsorption: filter the extract under reduced pressure, put the filtrate on the column with a height of 3.5m and a diameter of 1.0m, and XDA-8 macroporous resin adsorption column filled with resin, and adsorb at a flow rate of 50M3 / h;

[0031] (5) Washing and desorption: add ginger liquid with 3% concentration of 98% glacial acetic acid and boil for 10 minutes, then elute with 85% alcohol until the turbidity of the washing liquid...

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Abstract

The invention relates to a method for extracting curcumin from ginger. The method is characterized by comprising the following steps: (1) inspection and acceptance of raw materials; (2) drying and pulverizing; (3) alkaline water extraction; (4) filtering adsorption; (5) washing desorption; (6) vacuum concentration; and (7) drying of a finished product. A solvent-extraction method is adopted, so that the soaking time and curcumin impurities are effectively controlled; the extraction rate is high, and the obtained curcumin is high in purity and has a bright color.

Description

technical field [0001] The invention belongs to the technical field of pigment extraction, in particular to a method for extracting curcumin from ginger. Background technique [0002] With the deepening of human understanding of synthetic pigments, the demand for natural pigments will increase day by day. Curcumin is a natural edible pigment, which is bright in color and can increase the flavor of food. Curcumin can be widely used in food, medicine, health care, textile and other fields. The development and utilization of this product has broad market prospects and great development potential. [0003] Curcumin is a natural yellow pigment extracted from Curcuma longa, Curcuma longa, and Curcuma turmeric. It is a diketone, mainly including curcumin, demethoxycurcumin and dideoxycurcumin. Curcumin has good coloring and dispersibility, and has a special aroma, insoluble in cold water, acid-resistant, immediately turns red when it encounters alkali, has good stability to light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C09B67/54C09B67/10
CPCC09B61/00
Inventor 于帅臧启志展亚倩李进超
Owner QINGDAO PENGYUAN KANGHUA NATURAL PROD
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